[JAVA][Designing Enterprise Application].pdf

Designing Enterprise Applications

with the J2EE TM Platform, Second Edition

The Java ™ Series

(AW to Provide Film)

Designing Enterprise Applications

with the J2EE TM Platform, Second Edition

Inderjeet Singh, Beth Stearns,

Mark Johnson, and the Enterprise Team

Boston • San Francisco • New York • Toronto • Montreal

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may include one or more U.S. patents, foreign patents, or pending applications. Sun, Sun Microsys-

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transmitted, in any form, or by any means, electronic, mechanical, photocopying, recording, or other-

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simultaneously in Canada.

ISBN 0-201-78790-3

Text printed on recycled paper

1 2 3 4 5 6 7 8 9 10—CRS—0605040302

First printing, March 2002

Contents

Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv

About the Authors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. xix

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.1

Challenges of Enterprise Application Development. . . . . . . . . . . . . . 2

1.1.1

Programming Productivity . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1.2

Integration with Existing Systems. . . . . . . . . . . . . . . . . . . . . 4

1.1.3

Freedom of Choice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.1.4

Response to Demand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.1.5

Maintaining Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.2

The Platform for Enterprise Solutions . . . . . . . . . . . . . . . . . . . . . . . . 5

1.2.1

J2EE Platform Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.2.2

J2EE Platform Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.3

J2EE Application Scenarios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1.3.1

Multitier Application Scenario . . . . . . . . . . . . . . . . . . . . . . 16

1.3.2

Stand-Alone Client Scenario . . . . . . . . . . . . . . . . . . . . . . . . 18

1.3.3

Web-Centric Application Scenario . . . . . . . . . . . . . . . . . . . 19

1.3.4

Business-to-Business Scenario . . . . . . . . . . . . . . . . . . . . . . 20

1.4

How This Book Is Organized . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

1.5

Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

1.6

References and Resources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

J2EE Platform Technologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

2.1

Component Technologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

2.1.1

Types of J2EE Clients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

2.1.2

Web Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

2.1.3

Enterprise JavaBeans Components . . . . . . . . . . . . . . . . . . . 28

2.1.4

Components, Containers, and Services . . . . . . . . . . . . . . . . 31

2.2

Platform Roles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

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